Peru ( ( listen); Spanish: Perú [peˈɾu]; Quechua: Piruw Republika [pʰɪɾʊw]; Aymara: Piruw Suyu [pɪɾʊw]), officially the Republic of Peru (Spanish: República del Perú ), is a country in western South America. It is bordered in the north by Ecuador and Colombia, in the east by Brazil, in the southeast by Bolivia, in the south by Chile, and in the west by the Pacific Ocean. Peru is an extremely biodiverse country with habitats ranging from the arid plains of the Pacific coastal region in the west to the peaks of the Andes mountains vertically extending from the north to the southeast of the country to the tropical Amazon Basin rainforest in the east with the Amazon river.

Peruvian territory was home to several ancient cultures, ranging from the Norte Chico civilization in the 32nd century BC, the oldest civilization in the Americas, to the Inca Empire, the largest and most sophisticated state in pre-Columbian America. The Spanish Empire conquered the region in the 16th century and established a Viceroyalty that encompassed most of its South American colonies, with its capital in Lima. Peru formally proclaimed independence in 1821, and following the military campaigns of José de San Martín and Simón Bolívar, and the decisive battle of Ayacucho, Peru secured independence in 1824. In the ensuing years, the country enjoyed relative economic and political stability, which ended shortly before the War of the Pacific with Chile. Throughout the 20th century, Peru endured armed territorial disputes, coups, social unrest, and internal conflicts, as well as periods of stability and economic upswing.

Peru is a representative democratic republic divided into 25 regions. It is classified as an emerging market with a high level of human development and an upper middle income level with a poverty rate around 19 percent. It is one of the region's most prosperous economies with an average growth rate of 5.9% and it has one of the world's fastest industrial growth rates at an average of 9.6%. Its main economic activities include mining, manufacturing, agriculture and fishing. The country forms part of The Pacific Pumas, a political and economic grouping of countries along Latin America’s Pacific coast that share common trends of positive growth, stable macroeconomic foundations, improved governance and an openness to global integration. Peru ranks high in social freedom and it has the third lowest homicide rate in South America; it is an active member of the Asia-Pacific Economic Cooperation, USAN, the Pacific Alliance and the World Trade Organization; and is considered as a middle power.

Peru has a multiethnic population of over 31 million, which includes Amerindians, Europeans, Africans and Asians. The main spoken language is Spanish, although a significant number of Peruvians speak Quechua, Aymara or other native languages. This mixture of cultural traditions has resulted in a wide diversity of expressions in fields such as art, cuisine, literature, and music.